Let's say you living with your roommate.More often,he or she tends to sleep earlier than you.Could be his or her routine sleep cycle.So tonight is that night.
You are watching your favorite late night movie when you suddenly hear a loud snort.Surprise surprise!!Guess who it's coming from?Your roommate.Then after a few minutes you hear the loud snort again.This goes on for around 25 times in a duration of an hour.Then your roomie starts snoring.You quickly wear your signature headphones and continue watching the movie. The next morning you ask your roomie of the loud snorts and to his surprise he tells you that he was not aware of the loud snorts which leaves you equally surprised.During the day,you observe the roomie excessive sleepiness which widens the gapoff puzzle.
Turns out the roomie has a sleep disorder known as sleep apnea.(where one experiences breathing pauses while asleep).
The Breathing pauses can last from a few seconds to minutes.(Shallow breathing) Typically, normal breathing then starts again, sometimes with a loud snort.This disorder tends to disrupt sleep more so if you tend to have more apnea events during your 8 hours. When you're asleep, the muscles will relax, allowing the throat to collapse , causing an interruption of airflow,during these time one experiences shallow breathing or breathing pause which later triggers activities that tend to increase airflow which includes a loud snort and even snoring.
The more apnea events one experiences,the more tired they'll get when they wake up and also experience excessive sleepiness during the day.